Leaving oven cleaner on for too long can be dangerous and can damage your oven's surfaces. Oven cleaners typically contain strong chemicals that are designed to break down and dissolve tough, baked-on grease and grime. If left on for an extended period, these chemicals can eat away at the oven's interior coating, the oven racks, and other surfaces, leading to discoloration, corrosion, and even permanent damage.
Additionally, prolonged exposure to the fumes from oven cleaners can be harmful to your health, as these chemicals can release noxious gases that can irritate the respiratory system and cause other health issues.
To avoid any problems, it's essential to follow the manufacturer's instructions on the oven cleaner's label carefully. Typically, you should apply the cleaner, wait for the recommended amount of time (usually around 15-30 minutes), and then wipe it off thoroughly with a damp cloth or sponge. If you have any doubts or concerns, it's always best to consult the cleaner's instructions or contact the manufacturer for specific advice. And, of course, make sure to wear protective gloves and work in a well-ventilated area when using any cleaning chemicals.